Dockerfile

# Stage 1: Builder
FROM node:18-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install all dependencies including devDependencies
RUN npm ci

# Copy source code
COPY . .

# Build the application
RUN npm run build

# Stage 2: Production Runner
FROM node:18-alpine AS runner

WORKDIR /app

# Install only production dependencies
COPY package*.json ./
RUN npm ci --only=production && npm cache clean --force

# Copy built application from builder stage
COPY --from=builder /app/dist ./dist

# Create non-root user for security
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nextjs -u 1001

# Change ownership of the app directory
RUN chown -R nextjs:nodejs /app
USER nextjs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD curl -f http://localhost:3000/health || exit 1

# Start the application
CMD ["npm", "run", "start"]